Python调用PC摄像头实现扫描二维码

import cv2
from pyzbar import pyzbar
import winsound
 
# 打开摄像头
cap = cv2.VideoCapture(0)
 
# 设置窗口名和窗口大小
cv2.namedWindow('Scan QR Code', cv2.WINDOW_NORMAL)
cv2.resizeWindow('Scan QR Code', 800, 600)
 
 
 
# 创建声音提示函数
def beep():
    frequency = 2500
    duration = 1000
    winsound.Beep(frequency, duration)
 
while True:
    # 读取摄像头画面
    _, frame = cap.read()
 
    # 转换为灰度图像
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
 
    # 检测二维码
    barcodes = pyzbar.decode(gray)
 
  
    # 遍历所有检测到的二维码
    for barcode in barcodes:
        # 提取二维码的边界框坐标
        (x, y, w, h) = barcode.rect
 
        # 在图像中绘制二维码的边界框和文本
        cv2.rectangle(frame, (x, y), (x+w, y+h), (0, 0, 255), 2)
        cv2.putText(frame, barcode.data.decode('utf-8'), (x, y-10), cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 255), 2)
 
        # 发出声音提示
        beep()
 
        # 输出扫描到的二维码内容
        print(barcode.data.decode('utf-8'))
 
    # 显示图像
    cv2.imshow('Scan QR Code', frame)
 
    # 按下ESC键退出程序
    if cv2.waitKey(1) == 27:
        break
 
# 释放摄像头资源
cap.release()
 
# 关闭所有窗口
cv2.destroyAllWindows()